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                                <h1 id="date">Date</h1>
<p>&#x5728;JavaScript&#x4E2D;&#xFF0C;<code>Date</code>&#x5BF9;&#x8C61;&#x7528;&#x6765;&#x8868;&#x793A;&#x65E5;&#x671F;&#x548C;&#x65F6;&#x95F4;&#x3002;</p>
<p>&#x8981;&#x83B7;&#x53D6;&#x7CFB;&#x7EDF;&#x5F53;&#x524D;&#x65F6;&#x95F4;&#xFF0C;&#x7528;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">const</span> date = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>();<span class="hljs-comment">//  &#x6CE8;&#x610F;&#x8981;new &#x5426;&#x5219;&#x8C03;&#x7528;&#x4E0D;&#x4E86;&#x65B9;&#x6CD5;</span>
<span class="hljs-built_in">console</span>.log(date.toString()); <span class="hljs-comment">// Sat Aug 31 2019 19:09:13 GMT+0800 (GMT+08:00)</span>
<span class="hljs-built_in">console</span>.log(date.getFullYear()); <span class="hljs-comment">// 2019, &#x5E74;&#x4EFD;</span>
<span class="hljs-built_in">console</span>.log(date.getMonth()); <span class="hljs-comment">// 7,&#x6708;&#x4EFD;&#xFF0C;&#x6CE8;&#x610F;&#x6708;&#x4EFD;&#x8303;&#x56F4;&#x662F;0~11&#xFF0C;7&#x8868;&#x793A;&#x516B;&#x6708;</span>
<span class="hljs-built_in">console</span>.log(date.getDate()); <span class="hljs-comment">// 31&#x53F7;</span>
<span class="hljs-built_in">console</span>.log(date.getDay()); <span class="hljs-comment">// 6,&#x661F;&#x671F;&#x516D;</span>
<span class="hljs-built_in">console</span>.log(date.getHours()); <span class="hljs-comment">// 18,&#x65F6;</span>
<span class="hljs-built_in">console</span>.log(date.getMinutes()); <span class="hljs-comment">// 52,&#x5206;</span>
<span class="hljs-built_in">console</span>.log(date.getSeconds()); <span class="hljs-comment">// 24,&#x79D2;</span>
<span class="hljs-built_in">console</span>.log(date.getMilliseconds()); <span class="hljs-comment">// 202,&#x6BEB;&#x79D2;</span>
<span class="hljs-built_in">console</span>.log(date.getTime()); <span class="hljs-comment">//1567248744202 &#x65F6;&#x95F4;&#x6233;</span>
</code></pre>
<p>&#x5982;&#x679C;&#x8981;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x6307;&#x5B9A;&#x65E5;&#x671F;&#x548C;&#x65F6;&#x95F4;&#x7684;<code>Date</code>&#x5BF9;&#x8C61;&#xFF0C;&#x53EF;&#x4EE5;&#x7528;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x83B7;&#x53D6;&#x6307;&#x5B9A;&#x65F6;&#x95F4;</span>
<span class="hljs-keyword">const</span> next = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>(<span class="hljs-number">2020</span>,<span class="hljs-number">1</span>,<span class="hljs-number">1</span>,<span class="hljs-number">1</span>,<span class="hljs-number">1</span>,<span class="hljs-number">1</span>);
<span class="hljs-built_in">console</span>.log(next.toString()); <span class="hljs-comment">// Sat Feb 01 2020 01:01:01 GMT+0800 (GMT+08:00)</span>
</code></pre>
<p>&#x66F4;&#x6709;&#x610F;&#x601D;&#x7684;&#x662F;&#xFF0C;&#x8FD8;&#x80FD;&#x591F;&#x7528;&#x6765;&#x81EA;&#x52A8;&#x66F4;&#x6B63;&#x65F6;&#x95F4;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-comment">// &#x4F20;&#x5165;&#x4E00;&#x4E2A;&#x9519;&#x8BEF;&#x7684;&#x65F6;&#x95F4; &#x4F1A;&#x81EA;&#x52A8;&#x6821;&#x6B63;</span>
<span class="hljs-keyword">const</span> errorDate = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>(<span class="hljs-number">2020</span>,<span class="hljs-number">1</span>,<span class="hljs-number">55</span>,<span class="hljs-number">1</span>,<span class="hljs-number">1</span>,<span class="hljs-number">1</span>);
<span class="hljs-built_in">console</span>.log(errorDate.toString()); <span class="hljs-comment">// Thu Mar 26 2020 01:01:01 GMT+0800 (GMT+08:00)</span>
</code></pre>
<p>&#x4E00;&#x5B9A;&#x8981;&#x6CE8;&#x610F;&#x6708;&#x4EFD;&#x7684;&#x95EE;&#x9898;&#xFF0C;0-11&#x3002;</p>
<p>&#x7B2C;&#x4E8C;&#x79CD;&#x521B;&#x5EFA;&#x4E00;&#x4E2A;&#x6307;&#x5B9A;&#x65E5;&#x671F;&#x548C;&#x65F6;&#x95F4;&#x7684;&#x65B9;&#x6CD5;&#x662F;&#x89E3;&#x6790;&#x4E00;&#x4E2A;&#x7B26;&#x5408;<a href="http://www.w3.org/TR/NOTE-datetime" target="_blank">ISO 8601</a>&#x683C;&#x5F0F;&#x7684;&#x5B57;&#x7B26;&#x4E32;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">const</span> isoDate = <span class="hljs-built_in">Date</span>.parse(<span class="hljs-string">&apos;2020-09-23T22:49:22.875+08:00&apos;</span>);
<span class="hljs-built_in">console</span>.log(isoDate.toString()); <span class="hljs-comment">// 1600872562875</span>
</code></pre>
<p>&#x4F46;&#x5B83;&#x8FD4;&#x56DE;&#x7684;&#x4E0D;&#x662F;<code>Date</code>&#x5BF9;&#x8C61;&#xFF0C;&#x800C;&#x662F;&#x4E00;&#x4E2A;&#x65F6;&#x95F4;&#x6233;&#x3002;&#x4E0D;&#x8FC7;&#x6709;&#x65F6;&#x95F4;&#x6233;&#x5C31;&#x53EF;&#x4EE5;&#x5F88;&#x5BB9;&#x6613;&#x5730;&#x628A;&#x5B83;&#x8F6C;&#x6362;&#x4E3A;&#x4E00;&#x4E2A;<code>Date</code>&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">const</span> timeStampDate = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>(<span class="hljs-number">1600872562875</span>);
<span class="hljs-built_in">console</span>.log(timeStampDate.toString()); <span class="hljs-comment">// Wed Sep 23 2020 22:49:22 GMT+0800 (GMT+08:00)</span>
</code></pre>
<h3 id="&#x65F6;&#x533A;">&#x65F6;&#x533A;</h3>
<p><code>Date</code>&#x5BF9;&#x8C61;&#x8868;&#x793A;&#x7684;&#x65F6;&#x95F4;&#x603B;&#x662F;&#x6309;&#x6D4F;&#x89C8;&#x5668;&#x6240;&#x5728;&#x65F6;&#x533A;&#x663E;&#x793A;&#x7684;&#xFF0C;&#x4E0D;&#x8FC7;&#x6211;&#x4EEC;&#x65E2;&#x53EF;&#x4EE5;&#x663E;&#x793A;&#x672C;&#x5730;&#x65F6;&#x95F4;&#xFF0C;&#x4E5F;&#x53EF;&#x4EE5;&#x663E;&#x793A;&#x8C03;&#x6574;&#x540E;&#x7684;UTC&#x65F6;&#x95F4;&#xFF1A;</p>
<pre><code class="lang-javascript"><span class="hljs-keyword">const</span> localDate = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>();
<span class="hljs-comment">// &#x83B7;&#x53D6;&#x672C;&#x5730;&#x65F6;&#x95F4;</span>
<span class="hljs-built_in">console</span>.log(localDate.toLocaleString()); <span class="hljs-comment">// 2019-8-31 19:21:54</span>
<span class="hljs-comment">// &#x83B7;&#x53D6; UTC &#x65F6;&#x95F4; &#x76F8;&#x5DEE;8&#x5C0F;&#x65F6;</span>
<span class="hljs-built_in">console</span>.log(localDate.toUTCString()); <span class="hljs-comment">// Sat, 31 Aug 2019 11:21:54 GMT</span>
<span class="hljs-built_in">console</span>.log(localDate.toLocaleDateString()); <span class="hljs-comment">// 2019-8-31</span>
<span class="hljs-built_in">console</span>.log(localDate.toLocaleTimeString()); <span class="hljs-comment">// 19:21:54</span>
</code></pre>
<h3 id="&#x65F6;&#x95F4;&#x7684;&#x8BA1;&#x7B97;">&#x65F6;&#x95F4;&#x7684;&#x8BA1;&#x7B97;</h3>
<h4 id="&#x6BD4;&#x8F83;&#x4E24;&#x4E2A;&#x65F6;&#x95F4;&#x7684;&#x5927;&#x5C0F;">&#x6BD4;&#x8F83;&#x4E24;&#x4E2A;&#x65F6;&#x95F4;&#x7684;&#x5927;&#x5C0F;</h4>
<pre><code class="lang-js"><span class="hljs-meta">&apos;use strict&apos;</span>;

<span class="hljs-keyword">const</span> date1 = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>(<span class="hljs-string">&apos;2020-03-14 17:23:13&apos;</span>);
<span class="hljs-keyword">const</span> date2 = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>(<span class="hljs-string">&apos;2020-03-14 18:07:54&apos;</span>);
<span class="hljs-keyword">const</span> result = date1.getTime() - date2.getTime();
<span class="hljs-keyword">if</span> (result &gt; <span class="hljs-number">0</span>) {
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;date1 &gt; date2&apos;</span>);
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (result &lt; <span class="hljs-number">0</span>) {
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;date1 &lt; date2&apos;</span>);
} <span class="hljs-keyword">else</span> {
  <span class="hljs-built_in">console</span>.log(<span class="hljs-string">&apos;date1 == date2&apos;</span>);
}

===&gt;terminal
date1 &lt; date2
</code></pre>
<h4 id="&#x52A0;&#x4E0A;&#x4E00;&#x6BB5;&#x65F6;&#x95F4;">&#x52A0;&#x4E0A;&#x4E00;&#x6BB5;&#x65F6;&#x95F4;</h4>
<pre><code class="lang-js"><span class="hljs-keyword">const</span> date = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>();
<span class="hljs-built_in">console</span>.log(date.toLocaleString());
<span class="hljs-comment">// &#x52A0;&#x4E0A;&#x4E00;&#x4E2A;&#x5C0F;&#x65F6;</span>
date.setTime(date.getTime() + <span class="hljs-number">60</span> * <span class="hljs-number">60</span> * <span class="hljs-number">1000</span>);
<span class="hljs-built_in">console</span>.log(date.toLocaleString());

===&gt; terminal
<span class="hljs-number">2020</span><span class="hljs-number">-3</span><span class="hljs-number">-14</span> <span class="hljs-number">21</span>:<span class="hljs-number">50</span>:<span class="hljs-number">23</span>
<span class="hljs-number">2020</span><span class="hljs-number">-3</span><span class="hljs-number">-14</span> <span class="hljs-number">22</span>:<span class="hljs-number">50</span>:<span class="hljs-number">23</span>
</code></pre>

                                
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